I just changed the headgaskets, put studs for the oil pan, and put a new oil pan gasket. Now I have a knocking sound from the lower end. I don't know what's going on with this thing. First everything was running real well, then I noticed oil pressure was reading around 65lbs from idle to 6000 rpm. Then came the knock. First it was a tick, so I re-adjusted the rocker arms (solid lifer cam). That wasn't it so I changed the oil filter and checked the oil bypass spring. They're fine. So now I'm pulling the engine again so I can inspect the crank. It never ends. Atleast I can count on the Suburban to get me home. By the way it's a Big Block 396 set up for the drags if you have any ideas to what the problem is. <a target="_blank" href=http://community.webshots.com/user/chvyhs>WebShot Pics</a> It's a wheelbase thing, you wouldn't understand.